166500078 has 32 divisors (see below), whose sum is σ = 362620800. Its totient is φ = 50764896.

The previous prime is 166500071. The next prime is 166500109. The reversal of 166500078 is 870005661.

166500078 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×166500078³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166500071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21876 + ... + 28487.

It is an arithmetic number, because the mean of its divisors is an integer number (11331900).

Almost surely, 2^166500078 is an apocalyptic number.

166500078 is an abundant number, since it is smaller than the sum of its proper divisors (196120722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166500078 is a wasteful number, since it uses less digits than its factorization.

166500078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50416.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 166500078 is about 12903.4909230022. The cubic root of 166500078 is about 550.1377924730.

The spelling of 166500078 in words is "one hundred sixty-six million, five hundred thousand, seventy-eight".